2001 Es300 Ipod/aux Input

Hi. I am trying to find a way to hard wire an input into my factory head unit for an ipod. Is there any product out there for converting the cd changer connection on the factory head unit into an aux in or ipod input? I know there are a number of solutions out there like this for other cars but I have not been able to find one for my 2001 Lexus es300. If not, are there any other ideas besides a cassette adapter or fm modulator?
Thanks.

Look at usaspec.com they wont list a 2001 but if its a available for a toyota camry or avalon 2001 its possible it will work with your vehicle. Some toyota and lexus have the same harnesses.